path: resolve normalize drive letter to lower case

make path.resolve work the same as path.normalize

Author: dead-horse

lib/path.js

@@ -163,6 +163,11 @@ if (isWindows) {
     resolvedTail = normalizeArray(resolvedTail.split(/[\\\/]+/).filter(f),
                                   !resolvedAbsolute).join('\\');
 
+     // If device is a drive letter, we'll normalize to lower case.
+     if (resolvedDevice && resolvedDevice.charAt(1) === ':')
+       resolvedDevice = resolvedDevice[0].toLowerCase() +
+        resolvedDevice.substr(1);
+
     return (resolvedDevice + (resolvedAbsolute ? '\\' : '') + resolvedTail) ||
            '.';
   };

test/simple/test-path.js

@@ -321,7 +321,7 @@ if (isWindows) {
        [['c:/ignore', 'd:\\a/b\\c/d', '\\e.exe'], 'd:\\e.exe'],
        [['c:/ignore', 'c:/some/file'], 'c:\\some\\file'],
        [['d:/ignore', 'd:some/dir//'], 'd:\\ignore\\some\\dir'],
-       [['.'], process.cwd()],
+       [['.'], path.normalize(process.cwd())],
        [['//server/share', '..', 'relative\\'], '\\\\server\\share\\relative'],
        [['c:/', '//'], 'c:\\'],
        [['c:/', '//dir'], 'c:\\dir'],